Self-locking burr



April 16, 1946. J. w. JOHNSTON SELF-LOCKING BURR 2 Sheets-Sheet l Filed Sept. 16, 1944` By aaa/Wawy April 15, 1946- J. w. JOHNSTQN 2,398,377

SELF-LOCKING- BURR Filed Sept. 16, 1944 2 Sheets-Sheet 2 Patented Apr. '16, 1946 UNITED STATES PATENT OFFICE 2,398,377 SELF-LOCKING BURR Joseph W. Johnston,I Moneta, Calif. Application September 16, 1944, Serial No. 554,4 67

Claims.

This invention relates lto self-locking burr or nut. The primary object of this invention is the ditions of usage.

An additional object is the provision of such a burr which will resist any displacement due to vibration or the like.

Still another object is the provision of such a burr which will not be adapted to damage in any way the threads of a bolt or the like to which it may be applied, and which may be re-utilized several times if necessaryor desirable.

Still another object is the provision of such a device adapted to be used with various types of metal without alteration or change.

vdrawings wherein there are shown preferred embodiments of this inventive concept:

Figure 1 is a top plan view oi the burr assembly, certain parts thereof being removed.

Figure 2 is a bottom view of the device.

Figure 3 is a side elevational View of the complete assembly.

Figure 4 is a sectional view taken along the line -t of Figure 1.

Figure 5 is a sectional view taken substantially on the line 5 5 of Figure 1.

Figure 6 is a side sectional view showing certain of the operating parts of the mechanism, in the course of assembly.

Figure 7 is a side elevational view ol a modified detail of construction.

Similar reference characters refer to similar parts throughout the several views oi the drawsubstantially ings.

now to the drawings, there is generally indicated at I Il a self-locking burr or nut, comprised of an angular body in the illustrated form shown, hexagonal, and an interiorly Having reference at their inner extremities threaded bore II, adapted to engage the threaded portion I2 of a bolt or stud I3.

Cut into the base of nut body Ill is an annular recess I4 adjacent to the threads I2 of bolt I3. A similar annulus I5 is provided In a similar locality at the top of the body I Il, but provided with obliquely inclined sides, as at Ia, for a purpose being more fully described hereinafter.

Upper annulus I5 has a plurality of teeth I 6 integrally 4formed therein, circumferentially spaced and partially raised from the bottom and provided with projecting points I1 adapted to engage the threads I2 of bolt I3 when the device is applied (see Fig. 1), and each of the teeth or spurs I6 being generally arcuate in configuration to conform to the curvature of their associated annulus as well as the curvature of the bolt I3; and each being undercut in a horizontal direction, only united to the bottom of the annular by heel I6a as best shown in Figures 1 and 6, to form extending free resilient portions I9.

Annulus I4 :is provided with similar teeth 20 cross sectional conguration and adapted to engage closely within the space formed by the annulus. i

As best shown in Figures 3 and 5 oblique castellations 25 cut through the base of body portion annular recess I4 form locking points to engage the cup 23 with the gasket or packing material 22 contained therein.

Indentations 3I are provided peripherally about the exterior of cap 26, as is a relief shoulder 32 to provide means for relatively ready removal of thesame when desired.

A modification to accommodate Figure 7, wherein a locking burr. such conditions is shown in locking burr in is shown, identical in all respects with that previously described, with the exception of the cap. The cap portion Mi is generally similar in configuration with cap 26, being provided with recesses Iii, and a lter d2, but is provided with side walls adapted to accommodate either a relatively long extending boit or shank, or an increased quantity of packing or gasket material, and/or lubricant.

From the foregoing it will be seen that there is herein provided an improved locking burr accomplishing all of the objects of this invention and others including many advantages of great practical utility and commercial importance.

As many embodiments may be made oi the inventive concept, and as many modifications may be made in the embodiment hereinbefore shown and described, it is to be understood that all matter herein is to be interpreted merely as illustrative and not in a limiting sense.

I claim:

1. In a device of the character described, in combination, a body portion having upper and lower annular recesses formed therein, teeth integrally formed in the bottom of said recesses and raised thereabove, said teeth comprising circumierentially spaced and vertically supported arcuate members provided at their extremities with points, packing material engaged by said teeth, and means for holding said packing in position.

2. In a device of the character described, in combination, a body portion having upper and lower annular recesses formed therein, teeth integrally formed. in the bottom of said recesses and raised thereabove, said teeth comprising circumferentially spaced and vertically supported arcuate members provided at their extremities with points, packing material engaged by said teeth, and means for holding said packing in position, said means including a locking ring in said lower recess and a packing and lubricant-containing cup in said upper recess with interengaging tapering surfaces for retaining said cup in the upper recess.

combination, a body masas?? 3. In a device o! the character described, in portion having upper and lower annular recesses formed therein, teeth integrally formed in the bottom of said recesses and raised thereabove, said teeth comprising circumferentially and vertically supported arcuate 4members provided at their. extremities with points, packing material engaged by said teeth, and means for holding said packing in position, said means including a. locking ring in said lower recess and a packing and lubricant-containing cup in said upper recess with interengaging tapering surfaces for retaining said cup in the upper recess, and a lter gland on said cup.

4. In a device of the character described, in combination, a body portion having upper and lower annular recesses formed therein, teeth integrally formed in the bottom o! said recesses and raised thereabove, said teeth comprising circumierentlally spaced and vertically supported arcuate members provided at their extremities with points, packing material engaged by said teeth, and means for holding said packing in position. said means including a locking ring in said lower recess and a packing and lubricant-containing cup in said upper recess, and a filter gland on said cup, and snap acting means engageable in said upper recess with interengaging tapering surfaces for holding said cup in position.

5. In a device of the character described, in combination, a body portion having upper and lower annular recesses formed therein, teeth formed in the bottom of said recesses, said teeth comprising circumferentially spaced and vertically supported arcuate members provided at their extremities with points, packing material engaged by said teeth, and means for holding said packing in position, and means forming oblique castellations cut through said body portion intoA one of said recesses,

their extremities forming points.

JOSEPH W. JOHNSTON. 

